The 333 replaced the MH 33. The 333 was built with gasoline and diesel engines.The gasoline engines measured 208 cubic inches and produced 37 hp. This tractor was built in 1956 and 1957. There were 2748 - MH 333 tractors built. In 1957 it sold for $3000.The serial number on our tractor is #21052 making it a 1957 model. We purchased our tractor in Wawanesa.